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(11)

EP 3 788 440 A1

(12)

(43) Date of publication: 10.03.2021 Bulletin 2021/10 (21) Application number: 19721355.6 (22) Date of filing: 25.04.2019

(51) International Patent Classification (IPC):  G02F 1/1333(2006.01) G09F 3/00(2006.01) B42D 25/364(2014.01) (86) International application number: PCT/GB2019/051160 (87) International publication number: WO 2019/211582 (07.11.2019 Gazette 2019/45)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 03.05.2018 GB 201807323 (71) Applicant: Oxford University Innovation Limited Botley Oxford OX2 0JB (GB)

(72) Inventors: TARTAN, Chloe Ceren Oxfordshire OX2 0JB (GB) O'NEILL, John Sandford Oxfordshire OX2 0JB (GB) SALTER, Patrick Oxfordshire OX2 0JB (GB) MORRIS, Stephen Oxfordshire OX2 0JB (GB) RAVNIK, Miha Oxfordshire OX2 0JB (GB) BOOTH, Martin Oxfordshire OX2 0JB (GB) ELSTON, Steve Oxfordshire OX2 0JB (GB) (74) Representative: Barker Brettell LLP  100 Hagley Road Edgbaston Birmingham B16 8QQ Birmingham B16 8QQ (GB)